feat: complete TASK-WP0-01 toolchain skeleton

apps/web/src/main.tsx

@@ -0,0 +1,16 @@
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+
+import { ToolchainProbe } from "./toolchain-probe.js";
+
+const root = document.getElementById("root");
+
+if (!root) {
+  throw new Error("Dada web root element is missing.");
+}
+
+createRoot(root).render(
+  <StrictMode>
+    <ToolchainProbe />
+  </StrictMode>,
+);